Insulator-supporting pin



Sept.r 18 1923.

L.. STEINBERGER INsULAToR SUPPORTING RIN Filed March l1 Patented Sept. 18, 1923.

`LOUIS STEINBERGER, or BROOKLYN, NEW YORK.

yINSULATOR-suricarino rm.

Application Bled March 11, 1,919. Serial No. 281,944.

T 0 all whom it may concern:

Be it known that I, Louis STEINBERGER, a citizen of the United States, and a resident of the borough of Brooklyn, city and State of New York, have invented certain new and useful Improvements in Insulator-Supporting Pins, of which the following is a specification.

This' invention relates to supporting pins for insulators, the pins being provided with one ormore channels to permit the with drawal of the heated air from within the body of the insulator. The supporting pin herein described is particularly adapted for use in connection with insulators which are formed with special interior chambers or cavities provided forfthe purpose of cooling the interior of the insulator body, but it is not limited thereto as there is usually a slight space between the end of the supporting pin and the socket in the insulator with which it co-acts; which in degree will function as a cooling chamber.

One of the objects of the invention is to provide a supporting pin so constructed that it will provide a passage or passages connecting the outer atmosphere with the interior or cavity of the insulator so that air may passinto and out of the interior of the insulator mounted on the supporting pin.

Another object is to form a supporting pin with an interrupted screw-threaded shank so as to form channels therein to provide for the circulation of air within the socket of the insulator in similar manner.

Other objects will be apparent from the following description and the sub-joined claims.

Iny the drawing in which similar reference characters refer to similar parts in the several views Fig. 1 shows a central longitudinal sectional view of my improved supporting pin shown .in full lines, and one forni of insulator which it is adapted to support, shown in dotted lines.

Fig. 2 illustrates the pin in side elevation in connection with an insulator having a hollow interior metallic shell or thimble secured thereto.

Fig. 3 is a horizontal sectional view taken on line 3-3 of Fig. 1. n

In the drawings, the supporting pin I comprises a base or body portion 10 and a shank 11 having screw-threads 12 formed therein which are adapted to engage the female threads 31 of the insulator body 30. The shank 11 is usually although not necessaril of smaller diameter than the body portlon 10. When the shank and body portion are of different diametersthe shoulder 13 is formed which makes a good seat for the base 32 of the insulator.

In the preferred form of my invention I form longitudinal grooves 14 in the shank of the pinand radial outwardly extending grooves 15 in the shouldery 13 to form a continuous channel from the outer exposed surface of the pin to the extremity of the shank which extends into the insulator. The channels thus formed permit the escape of heated air from within the chamber 33 in the insulator when the air there confined becomes sufliciently heated to expand.

As illustrated in Fig. 1, the pin P is screwed directly into the insulator, the

'socket of which is usually provided with threads 31 though of course the pin may have a close frictional fit with the wall of the passageway 33 leading to the chamber 33. In some instances the insulator is constructed with a hollow thiinble 40, which is molded, cemented or otherwise fastened thereto, and this thimble is preferably provided with suitable threads 41 for engagement with the supporting pin as illustrated in Fig. 2.-

From the foregoing it will be readily seen that my improved supporting pin provides means for permitting the withdrawal of the heated air from the central portion of the insulator.

As changes of construction could be made within the scope of my invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and` not in a limiting sense.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. An insulator supporting pin comprising a body portion and a reduced securing shank, a shoulder formed therebetween, said shank being grooved longitudinally on the surface thereof and the shoulder of the body portion being grooved transversely, the lon` gitudinal and transverse groove connecting with each other to forni a continuous passageway from the extreniity of said shank to the outer surface of Said body portion.

Q. An insulator supporting pin having a buse portion provided with transversely disposed passages, a threaded shank for securing` the insulator thereon, said shank having a plurality of longitudinally disposed pas- Sages formed on the surface thereof and 10 opening into the interior of the insulator when the latter is in place, and to the atmosphere through the transversely disposed passages in said base portion.

In witness whereofj I have hereunto set my hund :1tthe borough of Manhattanl` city and State of New York, this 10th day of March, 191.9.

LOUIS STEINBERG-ER. In presence of- ZITA M. GimHAM. 

